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The firing nozzle is the one lying beneath the firing electrodes
(Fig. 12).
Make sure that the electrodes are positioned as shown in Fig. 12.
Finally remount the burner 4)(Fig. 13) to the slide bars 3) and
slide it up to the flange 5), keeping it slightly raised to prevent the
flame stability disk from pressing against the blast tube.
Tighten the screws 2) on the slide bars 3) and screw 1) that at-
taches the burner to the flange.
1
2
If it proves necessary to change a nozzle with the burner already
fitted to the boiler, proceed as outlined below:
open the burner on its guides as shown in Fig. 9 to page 15;
remove the nuts 1)(Fig. 14) and the diffuser disc assembly
2).
use spanner 3) to change the nozzles.
5.10
Combustion head adjustment
At this point of the installation, nozzle and pipe coupling are fixed
to the boiler as in Fig. 9 to page 15.
The setting of the combustion head depends exclusively on the
output of the burner - in other words, the combined output of the
two nozzles selected on page 16 is a particularly simple opera-
tion.
Turn screw 1)(Fig. 15) until the notch on the sheet 2) is level
with the plate 3).
Example
Burner with nozzles (gas oil):
1° = 3.50 GPH + 2° = 2.50 GPH and 12 bar pump pressure.
Find the delivery of the two nozzles in Tab. E to page 16:
25.4 kg/h (corresponding to 301 kW).
Diagram (Fig. 16) shows that for an output of 25.4 kg/h the burner
needs a combustion head notch regulation 3 approx.
Installation
3
4
17
GB
D590
5
D9501
1
3
3
2
1
Fig. 12
D7434
Fig. 13
2
Fig. 14
D3910
Fig. 15
6426
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